<?php

 /**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	private $_id;
	private $_fullname;
	private $_username;
	
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	public function authenticate()
	{
        $username = strtolower($this->username);
        $user = Users::model()->find('LOWER(username)=?',array($username));
        
        if($user === null)
        {
            $this->errorCode = self::ERROR_USERNAME_INVALID;
        }
        elseif(!$user->validatePassword($this->password))
        {
            $this->errorCode = self::ERROR_PASSWORD_INVALID;
        }
        else
        {
            $this->_id = $user->id;
            $this->_username = $user->username;
            $this->_fullname = $user->fullname;
            $this->setState('login', $this->_username);
            $this->errorCode = self::ERROR_NONE;
            
            Users::model()->updateByPk($user->id, array('last_login' => date('Y-m-d H:i:s')));
        }
        
        return !$this->errorCode;
    }
 
    public function getId()
    {
        return $this->_id;
    }
    
    public function getName()
    {
        return $this->_fullname;
    }
    
    public function getUsername()
    {
        return $this->_username;
    }
}